Ladder-jack-supporting device



May 13, 1930. w. B. HOLMES 1,758,319

LADDER JACK SUPPORTING DEVICE I Filed March 2, 1929 I 2 Sheets-Sheet l L Inventor WillzamB .Holmes A ttofney May 13, 1930. w. B. HOLMES LADDER JACK SUPPORTING DEVICE I Filed March 2, 1929 2 Sheets-Sheet 2 Inventor Wilflam .B.HbZmes Attorney Panama 13,1 30 7 1,75-s,31a

WILLIAM B. HOLMES, or: nAivrmonron, NEW JERSEY LAnnnR-JAcK-s'crronrrne Device,

Application filed March2, 1929. Serial No. 343,966.

This invention relates to an improved sup- Figure 4 isan elevational View showing porting dev'icem the form of an attachment the device folded. T i for ladder and constructed to be used 111 con- F igure 5 1s a perspective VIEW of-the dejunction with devices such as are commonly vice readyfor application to'the ladder. referred to in mechanical trade as "jacks, Referring first to-Figure. 5"itwill-beob- 5:;

brackets, and the like. served that the device, which as'before'stated t the present time itis customary to prois intheform ofan attachment, is generally vide auxiliary platforms and attaching designated by the reference character 6. It

referred to as a jack. The attaching means is madeof comparativelysturdymetaliparts.

means therefor which structure is generally is of general frame like configuration and is so made as to be connected with the side It: embodies] spaced parallel duplicate side 7 rails, or the rungs of the ladder, and the debars 7 having their upper ends benti upon vice is capable of detachable placement on themselves to;provide1hangerhooks-8; Simthe ladder near the top in order that-it will ilar hooks 9 are formed on the lower ends form a convenient'support for the Workman of these bars. he intermediate portions'of 65 in painting shingling, roofing, work and the theside-bars are also bent as at 10'to prolike. vide U-shaped. rung embracing portions. The purpose of the present inventionis to Thus each side baris'formed with a series provide a more dependable means for enof four distinct fasteners for .sep'arableenabling the ack to be connected thereto, the .gagement with the complemental rungs of 7 means being such as to permit it to be ap- .theladder. In addition, thedevicecom'prises plied to the ladder without requiring alteracross bars '11 fastened to the side bars by tions in the existing details. bolt and nut fastening devices 12. This ar:- Briefly stated, t he improved supporting rangement allows the; structure to be exdevice comprises a pair of longitudinal side panded into-a frame like form seen in Figbars disposed in spaced parallelism and con ure '5 or folded into the compact form seen nected together by-vertically spaced trans in Figure 4. .-It is yet to bee-mentioned that versely extending cross bars functioning as one or more latches 13 areprovideoLQ Ihave supplemental rungs, and side bars formed shown a single'latch in Figure 4 and it co- 7 with hooks to engage over the rungs on the operates with one of the bottom hooks 9. 80 ladder to hold the device securely in place. In practice the device is attached to the In carrying out the invention I have ladder 14 .as shown in Figures 1 and 2. In evolved and produced an attachmentwhich this, figure the rungs are designated. by the is exceptionally inexpensive, practical in reference character 15. and theiside rails by use," susceptible of easy application and rethe reference character 16. 'Thedevice when $5 moval, capable of being'folded into a complaced inflposition occupies theapproximate pact. package for convenient handling and place seenbetter in Figure 1. Here thesuptransportation, and otherwise well adapted plemental cross bars are disposed between to fulfill the requirements of an invention of the main rungs 15. Moreoverthe side bars ing the device applied to the ladder.

this class in a satisfactory manner. '7 are disposed against theinner sides of the In the drawings: V rails 16 of the ladder, thereby equally dis- Figure' 1 is a front elevational View showtributing the ,stra'inand insuring rigidity in action. Figure 2 is a vertical section on an enlarged I 'As shown. in Figure 2 the reference charscale showing theim'anner in which the jack acter17 designates a conventional jack. This (shown in dotted lines) is associated with the compriseshorizon'tal armslS havingattachsupporting device. ing; hooks 19 to eng ge over acomplemental .Figure 3 is a view of the lower end of one supplemental bar 11. A platform board-20 of the side bars of thedevice showing the is disposed across these arms. In s-additi'on pivoted retaining latch. V there are depending diagonal bracesf-21hav- 2 7 limited ring.

may be bodily adjusted and'hooked on such ing hooks 22 at their lower [ends to engage over the lowermost bar. There are three of these cross bars 11, thereby permitting the device 17 to be vertically adjusted within a However, the entire device rungsw as are desired j A careful consideration of the description in 'conj unction the reader to obtain a clear understanding of the construction,operation and features and advantages of the invention, Therefore, a more lengthy descriptionfis'regarded'um necessary. r y t 7 Minor changes in shapefsize, and rearrangement of details coming within the field of invention claimed maybe resorted to in actualpractice if desired. 7

Having thusdescribed the invention, what I claimas' new and desire to secure by Letters Patentisz a c,

1. Asa new product-of manufacture, an;

'mans jack of the attaching hooks,

attaching and supporting device for a work- 7 class described comprising a pair of, duplicate side bars provided with and r a plurality V of transversely V disposed longitudinally spaced cross bars connected'with the side barsandfuncwith the drawings will enable 5. A ladder attachment of the class described for use in association with a work-- WILLIAM 13., HOLMES.

rungengaging hooks. and at their lower ends with additional rung tioning as supplemental rungs, said cross 7 bars, whereby to permit the-structure to be folded in-to a compaotpackage. I

2 As a new product'of manufacture, a workmans jack supporting and attaching device comprising a frame like structure'embodying a'pair of spaced'parallel longitudibars adapted for disposition between and in contact with the inner surfaces of the side railsof conventional ladder, said side bars having meansfor connecting with the rungs of ala-dder, and a pluralityof longitudinally spaced transversely extending "bars beingpivotally connected'to the side cross bars connected Withthe il'ltermediate portionsof said'side barsl- V 3. As a new product 'of manufacture, a

ladder attachment for use in association'with aworkmans jack of the class described comprising a frame 'like'stru'cture embodying a rung engaging hooks,

pair of spaced sidebars formedwith intermediate U-shaped rung embracing portions andprovided at their opposite'ends with rung engaging hooks, andcross barsconnected with the side bars.

4. As a new product of manufacture, a

ladder attachment for use in association with a workmans ack of the class described comprising a frame llke structure embodying a pair of spaced side bars formed with intermediate U-shaped rung embracing portions and provided at their opposite ends with and Crossbars connected with the'i side bars, said crossbar-s being pivotally bolted ,to' said "side bars, whereby to permit the-structure to be folded into a compact packagefi I 

